Double axle

As a double axle was in the traffic law of the distance between two axes of more than 1 m and less than 2 m defined. In Germany , Section 34 (4) No. 2 of the current StVZO uses the term double-axle load, which applies to motor vehicles with less than 1.8 m center distance. If the center distance between two axles is less than 1 m, it is also referred to as a tandem axle.

technology

Axles at a very short distance are needed to increase the statutory limitation of the load capacity of the individual axle. In the case of the double axle, a distinction is made with regard to the suspension (together with the rigid axle and leaf springs / individual trailing arms) and the steerability (unguided / steerable). In the case of driven double axles, one also speaks of a double axle assembly. The Mercedes-Benz LP 333 from 1958, which is regarded as the forerunner of today's multi-link vehicles in Germany, was equipped with double- axle steering. Kässbohrer developed tandem trailers with a compensating hub as early as 1937; In 1965, Müller-Mitteltal presented the tandem trailer with a flatbed and body.

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  Steered double axle

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  Unsteered double axle

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  Tandem axle (trailer)

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  Trailing arm suspension

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  Double axle driven ( DAF YA-328 )

Permissible bogie loads

	Motor vehicles	pendant
<1 m center distance	11.5 t	11 t
1 m to <1.3 m	16 t	16 t
1.3 m to <1.8 m	18 t / 19 t	18 t
1.8 m and more	-	20 t

See also

• Double axle assembly

literature

• Heribert Braun, Günter Kolb: Truck. A textbook and reference work. 11th edition. Kirschbaum Verlag, Bonn 2012, ISBN 978-3-7812-1850-5 .
• Olaf von Fersen : A Century of Automotive Technology. Commercial vehicles. VDI-Verlag, Düsseldorf 1987, ISBN 3-18-400656-6 .
• Peter Hentschel : Road Traffic Law. 38th edition. CH Beck Verlag Munich, 2005, ISBN 3-406-52996-8 .
• Wolfgang Matschinsky: Wheel guides for road vehicles. Kinematics, Elasto-Kinematics and Construction. 3. Edition. 2007, ISBN 978-3-540-64155-1 .

References and comments

1. ↑ In the version of § 34 (1) No. 3 of the StVZO , which was valid until July 16, 1986 , the term double axle was required for double-axle caravans (forbidden passengers) behind motor vehicles: axle spacing at least 1 m and less than 2 m. See Peter Hentschel: Road Traffic Law. 2005, p. 614.
2. ↑ § 34 (4) StVZO
3. ↑ The driving license classes in the Federal Republic of Germany in the version valid until December 31, 1998 allow holders of driving license class 3 to drive trains with no more than three axles . If the center distance was less than 1 m, it was considered uniaxial. The key number of the vested rights today is 79.
4. ^ Wolfgang Matschinsky: Wheel guides of road vehicles. 2007, pp. 168, 269.
5. ↑ Heribert Braun, p. 383.
6. ^ Olaf von Fersen: Commercial vehicles. 1987, p. 180.
7. ^ Olaf von Fersen: Commercial vehicles. 1987, p. 270.
8. ↑ with double tires
9. ↑ § 34 (4) StVZO
10. ↑ Directive 96/53 EG (PDF)